216367028 has 12 divisors (see below), whose sum is σ = 391699140. Its totient is φ = 104452992.

The previous prime is 216366989. The next prime is 216367031. The reversal of 216367028 is 820763612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73994404 + 142372624 = 8602^2 + 11932^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932501 + ... + 932732.

It is an arithmetic number, because the mean of its divisors is an integer number (32641595).

Almost surely, 2^216367028 is an apocalyptic number.

It is an amenable number.

216367028 is a deficient number, since it is larger than the sum of its proper divisors (175332112).

216367028 is a wasteful number, since it uses less digits than its factorization.

216367028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865266 (or 1865264 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 216367028 is about 14709.4197030338. The cubic root of 216367028 is about 600.3396484360.

The spelling of 216367028 in words is "two hundred sixteen million, three hundred sixty-seven thousand, twenty-eight".